The Study Of Fluid-solid Interaction Dynamic Response About Masonry Structures Under The Action Of Debris Flow

Nowadays, for the environment destruction is more and more serious, also the debris flows isbecoming much more frequent and severe. And they are also global natural disasters. Huge losses arebrought to the people’s production and life, and even a threat to the human life safeties. So theunderstanding and research about the mechanism of the debris flows should be deepen necessarily.In recent years, the researches and preventions of debris flows are studied by many research scholarsand engineering technicians of from their own subject areas and target audiences. Such as theexperimental study and the theory analysis traditional means, thus the debris flow motion laws cannot be explained by these methods reasonably and accurately. Apparently, these approaches areclearly lagged behind for the modern debris flow dynamics studies.With continuously improvements of the computers, numerical calculation and simulationmethods have become mainstream ways for dynamics of debris flow researches. ANSYSWORKBENCH13.0, finite element analysis software is used to analysis the fluid-structureinteraction problems which occurred in debris flow.Main results are got as follows.1) The flow velocity of fluid is the key factor for changes of the stress and deformation instructure. Faster speed leads greater stress and deformation. Conversely, slower speed goes withsmaller stress and deformation.2) The front part of flow field, which is the part before contacting with the coupling surface,has a steady speed which is equal to inlet velocity basically. However, the speed increases sharplywhen contacting with the coupling surface.3) The destructive power of debris flow on the general masonry structures is huge.Particularly, there are remarkable contrasts of components stress between the direction facing theflow and other directions.4) After variously analysis of fluid-solid coupling conditions, the following conclusions aredrawn: the narrowest of field with the greater maximum stress of masonry structure, the biggeraspect ratio leads to the greater maximum stress; the greater length to width ratio goes with thegreater stress, and vice versa.